* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  .container {
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
  }

  .column {
    margin-bottom: 40px;
    position: relative;
  }

  .but {
    font-size: 30px;
    width: 30px;
    height: 30px;
    background-color: transparent;
    border: none;
  }

  .booook {
    display: flex;
    justify-content: space-around;
  }

  h2 {
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 20px;
  }

  .slider {
    position: relative;
    height: 400px;
    overflow: hidden;
  }

  .slider img {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .slider img:first-child {
    opacity: 1;
  }



  .book {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-around;
    width: 48%;
  }

  .book img {
    width: 120px;
    height: 160px;
    margin-right: 10px;
  }

  .line {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    margin: 5px;
  }

  .book_name {
    font-size: 20px;
  }

  .writer {
    font-size: 15px;
  }

  .borrow {
    font-size: 14px;
  }

  .inventory {
    font-size: 14px;
    margin: 0 10px 5px 0;
    text-align: right;
  }

  .intro {
    font-size: 14px;
  }

  .info button {
    width: 30%;
    height: 20px;
    background-color: #2C88D9;
    color: #fff;
    border: none;
    border-radius: 5px;
  }

  .info button:hover {
    background-color: #677794;
  }
